Improvement in hollow tiles



UNITED STATES PATENT OFFICEa BALTHASAR KREISCHER, OF NEW YORK, N. Y.

IMPROVEMENT IN HOLLOW TILES.

Specification form/ing part of Letters Patent No. 112,930, dated March21, 1871.

To all whom 'it may concern Be it known that I, BALTHASAR KEEIseHER, ofthe city, county, and State of New York, have invented a new andImproved Sectional Hollow Tile; and I do hereby declare the following tobe a full, clear, and exact descriplion thereof', which will enablethose skilled in the art to make and use the same, reference being hadto the accompanying drawing, forming part of this specitication, inwhich drawlng- Figure 1 represents a transverse section of thisinvention. Fig. 2 is a plan or top view oi the same.

Similar letters indicate corresponding parts.

This invention relates to a hollow tile which is constructed in threesections-viz., two end sections anda middle section or key-in such amanner that when the tile is put in a wall or ceiling and any portionot' said wall or ceiling gives or sinks in, the sections of the tile arecapable of accommodating themselves to the change in the wall orceiling, and thereby the cracking ofthe hollow tile is prevented; and,in fact, by making the hollow tiles in sections. their use for buildingpurposes is rendered practicable.

In the drawing, the letter A designates a hollow arched tile, which ismade in three sections, a b c, formed as shown in Fig. 1 ot' thedrawing; the middle section, b, forming the key for the end sections aand c. This tile is intended particularly for ceilings, and its endsections are provided with recesses, Il, to catch over the bottomilanges ot' the iron girders B.

If the tile is made in one piece, as heretofore, and one of' the girderssettles down, the tile, being unable to accommodate itself to. thechange in the position of the girders in relation to each other, isliable to crack, and my experiencehas shown that from this cause solelythe use of such hollow tiles has been found to be impraeticable.

If the tiles are made in sections, according to my invention, the endsections can slide on the key, or they can open and allow the key tocome down a little; or, in one Word, the tile is enabled to accommodateitself to any slight change in the relative position of the girderstoward each other, and the tile is not liable to break. l

Theletter C designates a flooring above t-he ceiling, the fioor restingon the girders B and on sleepers D D, which I prefer to place over thejoints of the different sections of the tile, where they are let intorecesses or grooves E, prepared for them when constructing the tile.

My invention enables me to obtain air spaces between the door and thetile, which have the effect to preserve the sleepers D and tile-flooringC, both of which are usually of wood.

In ordinary constructions, where brick 'arches span the intervalsbetween the iron girders B B, the spaces between the arches and theilooring, and along the sides of the sleepers l), are filled up withcement or other filling material, thereby excluding air and preventingventilation, and subjecting the sleepers and the tlooring to decay ordry-rot; but by my invention I secure ventilation to the sleepers andilooring by means of the airspaces F F, whereby the wood is preserved.

My invention has also the advantage of lightness, and facility ofconstruction and removal, the weight ot' an equal area of my sectionaltile, as compared with the ordinary brick and cement filling, beingabout as one' BALTHASAR KREISUHER.

Witnesses:

E. F. KAsTENHUBER C. WAHLEES.

